# Caffeine Curve — A Simpler Caffeine Tracker > Real-time caffeine level tracker using Apple Health data. (iPhone/iPad app by Haris Delalic.) - Source: https://appshunter.io/ios/app/caffeine-curve/id6760567892 (this page in markdown: same URL + `.md`) - Developer: [Haris Delalic](https://appshunter.io/developer/1885039771) - Category: Health & Fitness, Lifestyle - Price: Free - Rating: 5.00/5 from 4 App Store ratings · 2 written reviews indexed - Age rating: 4+ - Requires: iOS 16.6 · 4 MB - Languages: English - Released: 2026-03-28 - Data updated: 2026-07-09 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/caffeine-curve/id6760567892/reviews.md ## What is Caffeine Curve? Caffeine Curve helps you track your estimated caffeine level in real time. Using your dietary caffeine entries from Apple Health, the app estimates how much caffeine may still be active in your body throughout the day. It uses an absorption and elimination model to give you a more useful picture than intake alone. It is designed for a simple purpose: to give you the most useful caffeine information quickly and clearly. Whether you are deciding on another coffee, trying to stay in a good range for focus, or avoiding caffeine too close to bedtime, Caffeine Curve helps you understand where you stand right now. Features - Track your estimated current caffeine level - See how your caffeine level changes throughout the day - Reads dietary caffeine data from Apple Health - Check your current level from the Lock Screen widget - Understand how long caffeine may remain active - Clean, simple interface designed for quick checks - Rich Home Screen Widgets: Keep an eye on your caffeine levels and daily trends without even opening the app, featuring beautiful charts and gauges - Smart Complications: New rectangular and dial-top complications clearly show the exact time of your next peak or when you’ll be clear for sleep. - Useful Notifications: Get pinged exactly when you hit your caffeine peak or when your system drops below your personalized sleep-ready threshold. - Peak & Sleep Indicators: Know exactly when your coffee hits its peak and precisely when you are cleared for a good night's sleep - Unmatched Personalization: Choose from 5 different sensitivity profiles to perfectly match your unique body chemistry and caffeine decay rate - Try It Demo Mode: Explore the app's full capabilities and stunning visual charts using sample data before committing to logging your own - Beautiful & Customizable Design: Experience a gorgeous new "Liquid Glass" aesthetic that feels right at home on iOS, plus full control over Light/Dark modes and all-new tinted app icons. Caffeine can be logged automatically by other apps that write to Apple Health, or added manually in the Health app under Nutrition > Caffeine. Caffeine Curve is free to use, with no ads and no in-app purchases. It was built from a real daily need: a simple way to understand caffeine levels clearly, quickly, and without unnecessary extras. Important Individual caffeine metabolism varies. Factors such as genetics, liver health, medications, and pregnancy can affect absorption and elimination. Caffeine Curve is for informational purposes only and does not provide medical advice. ## Key features - Real-time caffeine level tracking - Caffeine absorption and elimination model - Apple Health integration - Lock Screen widget and Home Screen Widgets - Peak and sleep indicators - Personalized sensitivity profiles - Demo mode for exploration ## Recent user reviews (2 of 2) All indexed reviews: https://appshunter.io/ios/app/caffeine-curve/id6760567892/reviews.md ### 5/5 — Great for coffee lovers! An amazing way to track your caffeine trends throughout the day. *2026-04-26* I used to wonder how much caffeine I was actually consuming throughout the day. Once I realized coffee was starting to make me feel more sluggish instead of energized, I knew I needed better visibility. This app delivers exactly that, giving me a clear picture of my caffeine trends. The interface is clean, the widgets are well-designed, and the addition of the Apple Watch app is a great touch. What’s been most valuable is understanding when my caffeine levels drop enough to avoid disrupting sleep, something I hadn’t thought to track until I started noticing restless nights. It’s also helpful as a practical check, reminding me when it’s too late for another cup if I want to get to sleep at a specific time. The developer clearly put real thought into the experience, and I’m looking forward to seeing how it continues to evolve. ### 5/5 — Awesome service! *2026-04-26* This app is amazing, I couldn’t find anything that followed the decay time of caffeine until this. Awesome sauce. ## Frequently asked questions about Caffeine Curve ### How does Caffeine Curve track my caffeine? Caffeine Curve reads dietary caffeine data directly from Apple Health. It then uses an absorption and elimination model to estimate your current active caffeine level throughout the day. ### Can I see my caffeine level without opening Caffeine Curve? Yes, Caffeine Curve offers Lock Screen widgets and Rich Home Screen Widgets that display your current caffeine levels and daily trends. Smart Complications are also available for quick glances. ### Does Caffeine Curve have ads? No, Caffeine Curve is completely ad-free. It was designed to provide a simple, clear experience without any advertisements. ### How does Caffeine Curve help with sleep? The app provides 'Peak & Sleep Indicators' to show you exactly when your caffeine levels are expected to peak and when they will drop below a personalized threshold, indicating you are cleared for sleep. ### Can I customize Caffeine Curve to my body? Yes, Caffeine Curve offers 'Unmatched Personalization' with 5 different sensitivity profiles. This allows you to match the app's decay rate to your unique body chemistry. ### Is Caffeine Curve suitable for all ages? Caffeine Curve has an age rating of 4+, indicating it is generally suitable for a wide audience. However, individual caffeine metabolism can vary significantly. ### What devices does Caffeine Curve support? Caffeine Curve is currently supported on iPhone devices. It leverages Apple Health data, making it ideal for the Apple ecosystem. ### How often is Caffeine Curve updated? The latest version of Caffeine Curve is 2.2, and it was last updated on April 26, 2026. This indicates a relatively active development cycle. ## Version history (last 3 releases) ### 2.2 — 2026-04-26 Smart Notifications Stay informed without even opening the app: • Peak Alerts: Get notified exactly when your caffeine intake reaches its maximum effect. • Sleep Ready Alerts: Receive a notification the moment your caffeine levels drop below your sleep threshold. Liquid Glass Design We've overhauled the app's visuals with a premium touch: • Native Look: Main cards, buttons, and status badges on both iPhone and Apple Watch now feature a beautiful "Liquid Glass" effect, making the app feel more native and visually stunning. • Appearance Settings: You can now choose to view the app in Light Mode, Dark Mode, or follow your system settings. • New App Icons: Enjoy our updated dark and brand new tinted app icons to match your Home Screen aesthetic. Apple Watch Enhancements Your wrist just got a lot more informative: • New Complications: Added a detailed rectangular complication and a dial-top text complication that show exact times for when you will peak or be clear for sleep. • Data Freshness: Added a new freshness indicator so you always know exactly when your watch last synced with your phone. Widget & Chart Polish • Peak Watermark: We've added a helpful watermark to easily identify your peak caffeine times. ### 1.1 — 2026-03-31 Trend Indicators: Your caffeine now has a sense of direction. New trend arrows show whether levels are rising or falling on the main gauge, in recent intakes, and in a brand-new widget variation. Other Improvements: This update also brings smoother background syncing, more reliable widgets with fewer blank placeholders, and a cleaner interface with refreshed icons and clearer status badges. ### 1.0 — 2026-03-28 No release notes. --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-09.*